ES 6 +

 

ECMA Script 6

let helps you scope instead using var , var is global.

Const type you cannot assign when created after

Template string

Function printName(firstname)

{

console.log( `Hello ${ firstname }`);

}

Searching Strings

Symbols

The core of javascript applications are primitives,types such as numbers,string,array, objects and more. symbols are primitive. For unique ids.

 

Maps

In map, any value,both objects and primitives values may be used either as a key or a vlue.

Why map:

• When you want  to use something other than a string as a key

• Maps will return data in the same order it was inserted not like other objects.

Sets

Are collections of values.that can be any type.the rule of the sets is values should be unique.

If you try to add the same value again it will only keep only one instance of it.

Arrays and Array Methods

Spread Operator

Array Destructuring

Search Array

ECMA Script Objects

Object Literals

Spread operator with objects

Destructuring Objects

for/of Loop

Classes

Inherit with classes

Getting and Setting class values

Object

Classes

You can have getters and setters in classes and regular objects.

ECMA Script functions

.repeat() - repeat a string for some time.

Default function parameters

Arrow functions

Arrow function helps to keep the scope.

Generators 

Generators are new types of functions that allow us to pause functions in the middle of execution and   resume later.
Yield keyword will be used anytime where we want to pause, and next will be used to continue   the function.

Asynchronous Javascript

Promises

Used with the asynchronous behavior in the javascript.when there is a delay of doing something.

This boilerplate has tremendously reduced by fetch.

Fetch natively works in browsers, and there are libraries using fetch.

Async / Await

Async /Await with Fetch